main {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  margin: auto;
  background: #f3f3f3;
  max-width: 450px;
}
form {
  margin: 4rem 0;
  text-align: center;
}
form label {
  display: table;
  width: 100%;
  padding-bottom: 2rem;
  height: 2rem;
}
form label > span {
  display: table-cell;
  width: 35%;
  text-align: right;
  font-size: 1rem;
  vertical-align: middle;
}
form label em {
  display: table-cell;
  /* padding-left: 2rem; */
  height: 100%;
  text-align: left;
  vertical-align: middle;
  font-size: 1rem;
}
form label em input {
  height: 100%;
  width: 80%;
  background: #d7d7d9;
  border: none;
  text-indent: 1rem;
  border-radius: 5px;
  outline: none;
}
form label input[type='submit']  {
  width: 66.8%;
  height: 3.5rem;
  border-radius: 5px;
  outline: none;
  color: #fff;
  text-indent: 0;
  border: none;
}
form label .update_submit{
    background: url(/Card/Image/change_submit.png) no-repeat center/100% 100%;
}
form label .add_submit{
    background: url(/Card/Image/addagent.png) no-repeat center/100% 100%;
}
form label .adduser_submit{
    background: url(/Card/Image/adduserbtn.png) no-repeat center/100% 100%;
}